DFRobot 20W Adjustable DC-DC Boost Converter With Digital Display
Adjustable output: 5V–35V from a 3V–32V input
Up to 94% conversion efficiency
On-board digital voltmeter with self-calibration mode
Overheating protection and short-circuit protection
Screw terminal + solder pad dual connection options
The DFRobot 20W Adjustable DC-DC Boost Converter (DFR0123) is a compact step-up power module built around a professional boost IC. It accepts a wide 3–32V input and delivers a precisely regulated 5–35V output at up to ±0.05V accuracy, making it ideal for powering higher-voltage loads from batteries, automotive sources, or low-voltage bench supplies. The 400 kHz switching frequency keeps the design efficient across the full range, peaking at 94% conversion efficiency.
The module features an integrated digital display voltmeter that shows both input and output voltage, complete with a single-button self-calibration routine for accurate readings across the entire voltage range. Terminal blocks mean no soldering iron is required for most setups, while solder pads remain available for permanent installations. Built-in overheating and short-circuit protection safeguard both the module and the connected load during extended or high-demand operation.
1x DFRobot 20W Adjustable DC-DC Boost Converter With Digital Display
Excellent stability, and darn cheap, but may not be suitable for low-power applications.
I just measured the quiescent power consumption of the board, without any load, and it gobbles up 48 mA just sitting there, powered from a 5V smooth supply. This, I figure, would be power loss that would be in addition to the 10 percent total power loss reported as "%90 effeciency", which would be an additional tax on each amp that crosses the board of 100mA. So if your demand is 1 amp, it will probably ask for around 150 mA to operate, which is considerable in some applications. The board has operated very smoothly, and is incredibly cheap. But, for battery powered applications, or solar-powered applications, it is a hard decision to make whether to include it or not. It has worked perfectly to drive NPN MOSFET gates on the high side of a 12V DC motor H-Bridge (all NPN MOSFETs), which makes for cheap and effecient high-side switches, compared with PNP MOSFET, which have higher on-resistances. I think the lower on-resistance of a well-saturated NPN MOSFET gate is well worth the 48mA power-tax of this boost, especially if you're driving dozens of MOSFETS for high-current-draw, from that smooth 18V from this boost. But, for example, if you're just driving one single motor, this board's 48mA might be more than the power savings achieved by low RDS-on. Still, this is a solid board, and DFRobot's buck, also sold here, is amazing.
